High Strength Concrete Mix Ratio

Making concrete is a delicate balance particularly if you are going to make ultra high performance concrete.

High strength concrete mix ratio.

High strength concrete grades. The standard ratio is 11 percent portland cement 41 percent coarse aggregates such as gravel or crushed stone and 26 percent fine aggregates such as sand. Table 1 typical compressive strength1 compressive strength astm c39 age typical values 7 days 2500 psi 17 2 mpa 28 days 4000 psi 27 6 mpa slump range 2 3 51 76 mm 1. This concrete mix ratio of aggregate to sand to cement is an important factor in determining the compressive strength of the concrete mixture.

Quikrete concrete mix exceeds the compressive strength requirements of astm c387 as shown in table 1. These mix ratios are decided based on type of construction and mix designs. Water cement ratio theory states that for a given combination of materials and as long as workable consistency is obtained the strength of concrete at a given age depends on the w c ratio. The lower the w c ratio the higher the concrete strength.

Allyn luke concrete strength measured using concrete cubes produce a results different than concrete cylinders. Conservative estimates put concrete cylinders at 80 of concrete cubes for. Mix design of high strength concrete is influenced by properties of cement sand aggregates water cement ratio have compressive strength above 40 mpa. The strength of this mix ratio is good for most concrete slabs footings steps and foundation walls.

One of the best concrete mix ratios is 1 part cement 3 parts sand and 3 parts aggregate this will produce approximately a 3000 psi concrete mix. These are actual concrete mix ratios for 3000 3500 4000 and 4500 psi concrete these concrete mix ratios for 3000 3500 4000 and 4500 psi concrete come from the ready mix concrete company i use to pour concrete floors slabs patios pool decks and stamped concrete.